- Jul 31, 2012
- HD4600 / RX 570
- Mobile Phone
When you installed windows did you have the macOS drive connected to sata power and sata data ?I (seemingly) have a perfectly functional HP 8300 Elite SFF double booting with (1) MacOS installed on the first SATA SSD a while ago with this guide (2) Windows 10 on a second SATA SSD.
If you followed this guide https://www.tonymacx86.com/threads/make-a-windows-10-uefi-usb-installer.228959/#post-1557619 Windows should be installed UEFI and you then wouldn't need legacy support enabled to boot it. This is why I prefer to not have Windows and macOS booting on the same machine. Things can become a colossal mess very quickly.